Analysis of surface emitting distributed-feedback quantum cascade laser based on a surface-plasmon waveguide

An analysis of a surface emitting distributed-feedback quantum cascade laser（DFB QCL） based on a surface-plasmon waveguide is presented.The second-order grating realized by the sole patterning of the top metal provides strong feedback.The analysis is based on a coupled-mode theory derived from exact...

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Bibliographic Details
Published in:Journal of semiconductors 2010-11, Vol.31 (11), p.62-66
Main Authors: Guo, Wanhong, Lu, Quanyong, Liu, Junqi, Zhang, Wei, Jiang, Yuchao, Li, Lu, Wang, Lijun, Liu, Fengqi, Wang, Zhanguo
Format: Article
Language:English
Subjects:
分布反馈
分布式反馈
基础
等离子体波导
耦合效率
表面发光
量子级联激光器
金属图案
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Summary:An analysis of a surface emitting distributed-feedback quantum cascade laser（DFB QCL） based on a surface-plasmon waveguide is presented.The second-order grating realized by the sole patterning of the top metal provides strong feedback.The analysis is based on a coupled-mode theory derived from exact Floquet-Bloch solutions of the infinite periodic structure.The surface outcoupling efficiency and threshold gain for the optimized device design are 43%and 12 cm-1,respectively,which represent great improvements on the conventional dielectric waveguide based DFB QCL with typical values of 17.5%and 20 cm-1.
ISSN:1674-4926
DOI:10.1088/1674-4926/31/11/114014